Re: audi a6 2.7t smoking

It is not uncommon for the early 2.7 biturbos to need turbos. Drop the
under engine cover and you will see the intercoolers. Pull the hoses
off and check to see if any oil is present. Some oil is normal but if
there is a lot than the turbos need replacing. The cat converters are
very efficent and you might not always see excessive amount of smoke.

From 1999 to 2001 when VW was having oil consumption issues with the
2.0 we had cars that were do***ented oil consumers and never saw smoke
out the tail pipes.

Again why did you go to synthetic oil?  This car is suppose to use
regular oil. Model year 2004 is when everything swapped over to
synthetic across the model line.

Have you performed an oil consumption test?

Make sure the oil is at the full mark and write down the exact
mileage.

Use 4 full tanks of fuel.

Check the oil to see if it is moving.

If it is now monitor after each tank full.

The bottom line is you have to be at exactly 1 quart used on the
stick.

When you are write down the mileage top off the oil and do it again.

After the second quart now compare the results.

Is the second reading close to the first?

If it is close than that is the consumption to 1 quart of oil.

I wouldn't condem anything until you know exactly what the consumption
is.

Other posters did mention cold weather start up. Depending on your
location it is not uncommon to push some smoke because of fuel
enrichment during cold start up.



On Sat, 8 Dec 2007 06:15:30 -0800 (PST), Jims Audi
<14forest@[EMAIL PROTECTED]
> wrote:

>My 2000 audi a6 2.7t just started smoking (real bad) out of both
>exhaust pipes. It also sounds like the waste gate is partially open
>(like a small exhaust leak). The oil is 3 weeks old (synthetic 5w 40)
>as is the filter. I am not getting any engine codes and the car seems
>to run OK. Not that I took it too far when I saw the smoke. Could it
>be the turbo? What would cause that to happen? Too lean a fuel
>mixture? Just age?